Wrench.



PATBNTED NOV. 14, 1905.

W. R. TOMLINSON.

WRENCH.

APPLIOATION FILED APR. 2B. 1905.

'ZZ/7655 es UNITED STATES PATENT OFFICE.

WILLIAM R. TOMLINSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE BILLINGS t SPENCER COMPANY, OF f HARTFORD, CONNECTICUT, A

CORPORATION OF CONNECTICUT.

WRENCH.

Specification of Letters Patent.

Patented Nov. 14, 1905.

geous construction hereinafter described and claimed.

In the drawings, Figure l is a side view of the wrench, parts being broken away to show construction; and Fig. 2, an edge view thereof.

Referring to the drawings, a. in general denotes the wrench, having the handle b and the head c, having formed integral with it a jaw d. The movable jaw c is mounted on a base f, which fits within a suitably-shaped mortise g in the head. The lower edge of this base is provided with rack-teeth g. The head is apertured, as at h, to receive the nut t', which has an exterior worm engaging with the rack-teeth on the base. This nut is mounted free to turn on a pin C, which has bearings in the head at each side of the aperture. The pin has a knurled head 7c', a shoulder k2, lying against one end of the nut, and a threaded end portion k3, engaging threads in the head. This pin extends entirely through the head, its threaded end being peened over, so that it cannot be unscrewed out of the head. It will be seen that by turning the pin in one direction the threads draw it in, causing the shoulder to engage the nut and jam it against the opposite side of the aperture, thus locking it against accidental displacement.

In a Wrench of this character the nut is at all times exposed and very easily turned to v loosen the jaws or to alter their adjustment.

The means which I employ for locking the nut in place is extremely simple, adds no new parts to the regular wrench, is easily 0perated, and extremely eflicient. It will also be noted that the pin is secured of itself against displacement and by reason of its arrangement relative to the handle adds to rather than detracts from the strength of said handle.

I claim as my invention- The herein-described wrench comprising a handle, a head formed integral with the handle and having a transverse aperture, a mortise disposed at right angles -to the transverse aperture, and a jaw, and also having a threaded bore at one end of the transverse aperture and a comparatively large smooth bore at the opposite end thereof, a movable jaw having a rack disposed in the mortise of the head, a rotary nut disposed in the aperture of the head and having an exterior worm engaging the rack of the movable jaw and also having a central bore, and a headed pin having a comparativelylarge and smoothportion journaled in the smooth bore of the head and also having a comparatively small smooth portion disposed in the bore of the nut and terminating in a threaded portion arranged in andengaging the threaded bore of the head and having an enlargement at its outer end.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM R. TOMLINSON.

Witnesses:

F. C. BLAND, DANIEL E. JOHNSON. 

